AC Motors and Control Gear: A Practical Work for Installation Engineers, Contractors, Plant Engineers and Works Electricians |
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Page 52
... machine falls out of step and comes to rest . How the Synchronous - induction Motor Differs from the Induction Motor and the Synchronous Motor . The synchronous - induction motor is a machine which is started as a slip - ring induction ...
... machine falls out of step and comes to rest . How the Synchronous - induction Motor Differs from the Induction Motor and the Synchronous Motor . The synchronous - induction motor is a machine which is started as a slip - ring induction ...
Page 82
... machine can withstand rapid acceleration from rest to full speed . The principal applications include - light machine tools , woodworking machines , small fans , blowers , and similar machines possessing small flywheel effect which ...
... machine can withstand rapid acceleration from rest to full speed . The principal applications include - light machine tools , woodworking machines , small fans , blowers , and similar machines possessing small flywheel effect which ...
Page 206
... machine , if the line voltage is reduced , the available torque is also reduced ; consequently under such conditions , if the torque of the driven apparatus remains constant , then the speed of the motor will fall . If the voltage ...
... machine , if the line voltage is reduced , the available torque is also reduced ; consequently under such conditions , if the torque of the driven apparatus remains constant , then the speed of the motor will fall . If the voltage ...
Contents
TYPES OF AC MOTORS AND THEIR | 1 |
THREEPHASE INDUCTION MOTORS | 18 |
THREEPHASE INDUCTION COMMUTA | 36 |
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amperes armature auto-transformer auxiliary switch bi-metal strip brush button capacitor motor cent change-over closed commutator CONTACTOR STARTER contacts control gear dashpot DC motor delta connection diagram direct current direct switching electrical electromagnetic excitation Factor and Efficiency fitted fractional h.p. full-load current full-load torque h.p. motors hand-operated starters illustrated in Fig load machine magnetic main winding master frequency mechanical multi-finger normal number of poles obtained operating coil over-current releases overload phase plunger pole face position power factor push-button reactance repulsion motor reversing rotary magnetic field rotation rotor circuit rotor winding running secondary winding short-circuiting shown in Fig single-phase Slip Rings SLIP-RING MOTOR slots small motors solenoid speed characteristic squirrel-cage motor STAR-DELTA STARTER starting current starting period starting resistance starting rheostat starting switch starting torque starting winding stator contactor stator control switch stator winding suitable synchronous motor thermal relay three-phase induction motor three-phase motor tripping bar under-voltage release voltage volts